Viewing file:  sa1100_yopy.c (3.09 KB) -rw-r--r--
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/*
* drivers/pcmcia/sa1100_yopy.c
*
* PCMCIA implementation routines for Yopy
*
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/arch/pcmcia.h>
static inline void pcmcia_power(int on) {
/* high for power up */
yopy_gpio_set(GPIO_CF_POWER, on);
}
static inline void pcmcia_reset(int reset)
{
/* high for reset */
yopy_gpio_set(GPIO_CF_RESET, reset);
}
static int yopy_pcmcia_init(struct pcmcia_init *init)
{
int irq, res;
pcmcia_power(0);
pcmcia_reset(1);
/* All those are inputs */
GPDR &= ~(GPIO_CF_CD | GPIO_CF_BVD2 | GPIO_CF_BVD1 | GPIO_CF_IREQ);
GAFR &= ~(GPIO_CF_CD | GPIO_CF_BVD2 | GPIO_CF_BVD1 | GPIO_CF_IREQ);
/* Set transition detect */
set_GPIO_IRQ_edge( GPIO_CF_CD|GPIO_CF_BVD2|GPIO_CF_BVD1,
GPIO_BOTH_EDGES );
set_GPIO_IRQ_edge( GPIO_CF_IREQ, GPIO_FALLING_EDGE );
/* Register interrupts */
irq = IRQ_CF_CD;
res = request_irq(irq, init->handler, SA_INTERRUPT, "CF_CD", NULL);
if (res < 0) goto irq_err;
irq = IRQ_CF_BVD2;
res = request_irq(irq, init->handler, SA_INTERRUPT, "CF_BVD2", NULL);
if (res < 0) goto irq_err;
irq = IRQ_CF_BVD1;
res = request_irq(irq, init->handler, SA_INTERRUPT, "CF_BVD1", NULL);
if (res < 0) goto irq_err;
return 1;
irq_err:
printk(KERN_ERR "%s: Request for IRQ %d failed\n", __FUNCTION__, irq);
return -1;
}
static int yopy_pcmcia_shutdown(void)
{
/* disable IRQs */
free_irq( IRQ_CF_CD, NULL );
free_irq( IRQ_CF_BVD2, NULL );
free_irq( IRQ_CF_BVD1, NULL );
/* Disable CF */
pcmcia_reset(1);
pcmcia_power(0);
return 0;
}
static int yopy_pcmcia_socket_state(struct pcmcia_state_array *state_array)
{
unsigned long levels;
if (state_array->size != 1)
return -1;
memset(state_array->state, 0,
state_array->size * sizeof(struct pcmcia_state));
levels = GPLR;
state_array->state[0].detect = (levels & GPIO_CF_CD) ? 0 : 1;
state_array->state[0].ready = (levels & GPIO_CF_READY) ? 1 : 0;
state_array->state[0].bvd1 = (levels & GPIO_CF_BVD1) ? 1 : 0;
state_array->state[0].bvd2 = (levels & GPIO_CF_BVD2) ? 1 : 0;
state_array->state[0].wrprot = 0; /* Not available on Yopy. */
state_array->state[0].vs_3v = 0; /* FIXME Can only apply 3.3V on Yopy. */
state_array->state[0].vs_Xv = 0;
return 1;
}
static int yopy_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
{
if (info->sock != 0)
return -1;
info->irq = IRQ_CF_IREQ;
return 0;
}
static int yopy_pcmcia_configure_socket(const struct pcmcia_configure *configure)
{
if (configure->sock != 0)
return -1;
switch (configure->vcc) {
case 0: /* power off */;
pcmcia_power(0);
break;
case 50:
printk(KERN_WARNING __FUNCTION__"(): CS asked for 5V, applying 3.3V..\n");
case 33:
pcmcia_power(1);
break;
default:
printk(KERN_ERR __FUNCTION__"(): unrecognized Vcc %u\n",
configure->vcc);
return -1;
}
pcmcia_reset(configure->reset);
/* Silently ignore Vpp, output enable, speaker enable. */
return 0;
}
struct pcmcia_low_level yopy_pcmcia_ops = {
yopy_pcmcia_init,
yopy_pcmcia_shutdown,
yopy_pcmcia_socket_state,
yopy_pcmcia_get_irq_info,
yopy_pcmcia_configure_socket
};
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